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Unaudited Condensed Consolidated Statements of Changes in Stockholders' (Deficit) Equity - USD ($)
shares in Thousands, $ in Thousands
Preferred Stock
Series B Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Loss
Accumulated Deficit
Total
Balance at Dec. 31, 2022 $ 37,656 $ 480 $ 806,488 $ (678) $ (808,866) $ (2,576)
Balance (in shares) at Dec. 31, 2022   479,637        
Changes in Stockholders' Equity (Deficit)            
Issuance of common stock, net of issuance costs   $ 10 7,366     7,376
Issuance of common stock, net of issuance costs (in shares)   9,945        
Issued common stock for vested RSUs and ESPP purchase   $ 6 199     205
Issued common stock for vested RSUs and ESPP purchase (in shares)   5,581        
Issuance of warrants, net of issuance costs     63,645     63,645
Exercise of stock options and warrants     3     3
Exercise of stock options and warrants (in shares)   6        
Exchange of 2025 Notes   $ 35 20,967     21,002
Exchange in 2025 Notes (in shares)   35,139        
Stock-based compensation expense     6,735     6,735
Shares withheld related to net share settlement of equity awards   $ (2) (1,601)     (1,603)
Shares withheld related to net share settlement of equity awards (in shares)   (2,132)        
Other     (137)     (137)
Net loss         (43,202) (43,202)
Other comprehensive income, net of tax       619   619
Balance at Sep. 30, 2023 37,656 $ 528 903,665 (59) (852,069) 52,065
Balance (in shares) at Sep. 30, 2023   528,176        
Balance at Dec. 31, 2022 37,656 $ 480 806,488 (678) (808,866) (2,576)
Balance (in shares) at Dec. 31, 2022   479,637        
Changes in Stockholders' Equity (Deficit)            
Net loss           (60,400)
Balance at Dec. 31, 2023 37,656 $ 530 904,535 (11) (869,258) 35,796
Balance (in shares) at Dec. 31, 2023   530,364        
Balance at Jun. 30, 2023 37,656 $ 493 880,129 (120) (827,965) 52,537
Balance (in shares) at Jun. 30, 2023   492,827        
Changes in Stockholders' Equity (Deficit)            
Issuance of common stock, net of issuance costs   $ 1 117     118
Issuance of common stock, net of issuance costs (in shares)   210        
Issuance of warrants, net of issuance costs     363     363
Exercise of stock options and warrants     5     5
Exchange of 2025 Notes   $ 35 20,967     21,002
Exchange in 2025 Notes (in shares)   35,139        
Stock-based compensation expense     2,084     2,084
Net loss         (24,103) (24,103)
Other comprehensive income, net of tax       61   61
Balance at Sep. 30, 2023 37,656 $ 528 903,665 (59) (852,069) 52,065
Balance (in shares) at Sep. 30, 2023   528,176        
Balance at Dec. 31, 2023 37,656 $ 530 904,535 (11) (869,258) 35,796
Balance (in shares) at Dec. 31, 2023   530,364        
Changes in Stockholders' Equity (Deficit)            
Issuance of common stock, net of issuance costs   $ 11 3,656     3,667
Issuance of common stock, net of issuance costs (in shares)   10,767        
Issued common stock for vested RSUs and ESPP purchase   $ 7 170     177
Issued common stock for vested RSUs and ESPP purchase (in shares)   6,785        
Issuance of warrants, net of issuance costs     149     149
Exercise of stock options and warrants     6     6
Exercise of stock options and warrants (in shares)   12        
Stock-based compensation expense     7,160     7,160
Shares withheld related to net share settlement of equity awards   $ (2) (1,039)     (1,041)
Shares withheld related to net share settlement of equity awards (in shares)   (2,316)        
Net loss         (63,140) (63,140)
Other comprehensive income, net of tax       45   45
Balance at Sep. 30, 2024 37,656 $ 546 914,637 34 (932,398) (17,181)
Balance (in shares) at Sep. 30, 2024   545,612        
Balance at Jun. 30, 2024 37,656 $ 535 908,472 (7) (908,422) 578
Balance (in shares) at Jun. 30, 2024   535,277        
Changes in Stockholders' Equity (Deficit)            
Issuance of common stock, net of issuance costs   $ 10 3,657     3,667
Issuance of common stock, net of issuance costs (in shares)   10,039        
Issued common stock for vested RSUs and ESPP purchase   $ 1 75     76
Issued common stock for vested RSUs and ESPP purchase (in shares)   296        
Issuance of warrants, net of issuance costs     1     1
Stock-based compensation expense     2,432     2,432
Net loss         (23,976) (23,976)
Other comprehensive income, net of tax       41   41
Balance at Sep. 30, 2024 $ 37,656 $ 546 $ 914,637 $ 34 $ (932,398) $ (17,181)
Balance (in shares) at Sep. 30, 2024   545,612